Finger-guard bolt



(N0 Model.)

D. WOEHRLE. FINGER GUARD BOLT.

No. 437,072. Patented Sept. 23, 1890.

UNITED STATES PATENT O FICE.

DAVID l/VOEHRLE, OF SIOUX FALLS, SOUTH DAKOTA.

FINGER-GUARD BDOLT.

SPECIFICATION forming part of Letters Patent No. 437,072, datedSeptember 23, 1890.

1 Application filed May 22, 1890. Serial No. 352,725- (No model.)

To all whom it may concern.-

l 3e it known that I, DAVID WOEHRLE, a citizen of the United States,residing at Sioux Falls, in the county of Minnehaha and State of SouthDakota, have invented certain new and useful Improvements in Mower andHarvester Finger-Guard Bolts; and I do declare the following to be afull, clear, and exact descriptlon of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to an improvement in bolts which are adapted foruse in securing the ledger-plates to the finger-guards of harvesters andmowers, as will be hereinafter set forth.

Referring to the accompanying drawings, F gure 1 is a longitudinalvertical sectional View of a fin get-guard having the led ger-platesecured thereto by means of my improved bolt. Fig. 2 is a top plan view.Fig. 8 is a bottom plan view; and Figs. 4, 5, and 6 are geils ail viewsillustrating difierent forms of the In fin ger-guards for harvesters andmowers it is very important that the means of securing the ledger-platesin position should leave a smooth even surface on top for the freemovement of the sickle-sections back and forth upon them, and it shouldalso make as close a fit or joint as possible to avoid the lodgment ofdirt, 820. By means of my improved bolt I secure such a construction, asone end of the bolt is flush with the top of the ledgerplate and theother end is flush or within the lower side of the guard.

In applying the bolt I provide the fingerguard with a verticalperforation 2, which will register with a corresponding perforation 4 inthe ledger-plate 3. Fitting within these perforations is a bolt 5, thelower portion of which, or shank 6, isscrew-threaded and provided with ahead 7, which engages with the lower portion of the guard and preventsit being drawn up through the guard. I prefer to countersink the lowerportion of the hole in the guard, so that the head will not proj cotbelow the guard and catch upon obstructions, &c., and by making theenlarged portion correspond with the shape of the head, which ispreferably oval or angular, the bolt can be tightened without applyingany special means to the bolt-head for keeping it from turning aroundwith the nut.

The nut which I prefer to use in connection with the bolt consists of ahollow socket 8, the closed end of which 9 is formed into a head, whichis preferably made beveled or inclined upon its inner portion to fit thecorrespondingly-flaring hole -.t in the ledger-plate. The top of thehead is provided with a slot or recess 10, which does not extendentirely to the edge at any point, thus presenting an unbroken outlineall around the hole in the plate, and prevents the lodgment or entry ofdirt, 850., within the joint between the plate and the head of the nut.The interior of the socket is screw-threaded to correspond and engagewith the threads of the bolt. To permit of the lower portion of the nutengaging with the screw-threaded portion of the bolt, the upper portionof the hole in the guard is enlarged sufficiently to permit of the entryof the lower portion of the nut. The nut is cylindrical to permit of itsfree rotation in securing the parts together. The holes can thus be maderound, which permits of their being readily formed with a drill, andespecially the upper enlarged portion of thehole inthe guard.

If the guard is recessed below the ledgerplate, as shown at 10, theenlargement need not be so extensive, or the recess can be made to takethe place of or form the enlargement.

As above described, the ledger-plate can be quickly and firmly securedto the guard by inserting the bolt from beneath until its head entersthe enlargement in the hole, and the nut is then passed down through theledgerplate until its lower end engages with the upper end of the bolt,when it is rotated until the two have been drawn together to any desired extent.

Having described my invention, what I claim is- The combination, withthe finger-guard ot' harvesters and mowers, having a vertical holethrough it enlarged at its upper and lower portions, of a ledger-platesecured thereto, having a countersunk hole through it registering withthe hole through the guard, a bolt in the hole in the guard, the shankof which is screw-threaded and the head of which cor responds with andfits within the enlargement rotating it which does not extend to theedge of the lower port-ion of the hole, and a hollow at any point,substantially as described. [0 cylindrical socket, the interior of whichis In testimony WhereofIaffix my signaturein screw-threaded and engageswith the upper presence of two Witnesses.

end of the bolt within the upper enlarged por- DAVID WOEHRLE. tion ofthe hole in the guard, and having its NVitnesses:

head beveled or inclined upon its inner sur- CHAS. L. EROCKWAY,

face, and having a slot or recess in its top for XV. II. WILSON.

